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Showing 1 to 20 of 126 for “"non-point"”.
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Pollution aspects derived from non-point sources
… of storm runoff and for determination of whether non-point sources of pollution are great enough to be included in water pollution abatement programs. The Town of Blacksburg, Virginia, was the area of study with eleven sampling sites determined by size of drainage area and dominant land use …
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Agricultural non-point source (AGNPS) water quality modeling in a GIS environment
… database in order to undertake Agricultural Non-Point Source (AGNPS) water quality modeling. Three general areas of GIS technology were investigated consisting of technical issues involved in linking GIS; the model; database development; and a discussion of system performance from an …
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WATER QUALITY IMPACT OF NON-POINT SOURCE CONTAMINANTS IN SMALL TIDAL RIVERS
… methodology was developed for analysis of non-point contaminant production and water quality impacts in estuarine receiving waters. The methodology was calibrated against contaminant source observations and estuarine data.</p><p>Contaminant source loading is based on the runoff curve number …
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Quantifying the Potential for Non-Point Source Pollution in Model Urban Landscapes
The contribution of non-point source pollution to degrading surface water quality is considerable throughout Virginia and beyond. While research on agricultural best management practices in nutrient management and nutrient and soil stabilization has made progress in reducing agricultural …
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Acute Toxicity and Sub-Lethal Effects of Non-Point Source Pollutants on Invertebrates
Non-point source pollution is not generated from any single source, rather can arise from a mixture of agricultural, residential, and industrial activities. As a result of these activities millions of tons of chemicals enter into aquatic environments annually with the potential to disrupt the …
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Assessing Urban Non-Point Source pollutants at the Virginia Tech Extended Dry Detention Pond
… understanding the characteristics of urban non-point source pollution has become a focus for water quality investigators. Once thought to be a small contributor to the pollution problem, urban non-point sources are now responsible for transporting over 50% of all pollutants into natural …
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Spatial Trends of Non-Point Pollutants in Bottom Sediment of Lake Springfield, Southwest Missouri
… of Lake Springfield to identify sources of non-point pollutants. With the recent discussions of dredging Lake Springfield, the question of sediment contamination within the lake also needs to be addressed. Lake Springfield covers 300 acres in southwestern Missouri and was formed by a dam …
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Assessment and prediction of surface water vulnerability from non-point source pollution in Midwestern watersheds
<p>"Non-point source pollution is the leading cause of impairment in surface water in the Midwest. In this research, we seek to predict which watersheds are most vulnerable to point source pollution without field sampling using publically available GIS databases. Watersheds with higher …
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Evaluating non-point source microplastic pollution and its impact on biota in the Huron River
… waterways through a myriad of sources, including point sources such as wastewater treatment plants (WWTPs) and nonpoint sources, such as runoff. Microplastics can act as vectors for other CECs, such as non-steroidal anti-inflammatory drugs (NSAIDs), into biota. The goal of this study was to …
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Modeling and analysis of non-point source runoff and best management practice devices in Acton, MA
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1999.
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All it takes is a nudge: pushing environmental federalism to tackle the massive non-point source pollution problem
Controlling the massive problem of excess nutrient pollution in America's most prominent waters through the Clean Water Act continues to challenge administrators both on the ground and in the courts. Widespread hypoxia in the Gulf of Mexico, impaired waterways in Florida, and a declining fishing …
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A framework for assessing viability of adoption of conservation practice for reducing nitrate-N
… to solve the ever-increasing problem of non-point source pollution. The impact of some practices on the environment, however, is not fully understood, and non-point source pollution continues to be a substantial source of contamination to our waterbodies. Most of the conservation …
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Association between Air Pollution and Cancer Incidence by region
… and cancer incidence ratio was negative when point source was only considered. But that was positive when exposure quantity was calculated by point and non-point source. CONCLUSION: This study found that NOx and PM10 were associated with cancer and that carcinogens by non-point source had …
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Design of a watershed-based nitrogen trading system or the Big and Little Wood Rivers Watershed
… and 0.33 kg3/yr of surface water outflow. A point source/non-point source trading arrangement was set for the Watershed based on the currently high proportion of nonpoint nitrogen sources (e.g. agricultural lands and rangeland) and the future potential for increases in the proportion of …
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DESIGNING WATERSHED-SCALE STRUCTURAL BEST MANAGEMENT PRACTICES USING EVOLUTIONARY ALGORITHMS TO ACHIEVE WATER QUALITY GOALS
… There are two main sources of water pollution: point sources and non-point sources, which are differentiated based on their mode of generation. Pollution generated from point sources has been effectively controlled by the implementation of the National Pollution Discharge Elimination System …
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CLIMATE CHANGE IMPACTS ON THE SOIL EROSION AND NUTRIENT LOSSES IN THE GREAT LAKES REGION
Pollutants from non-point sources (NPS) have become the primary reason for water quality degradation in the Great Lakes region after great progress has been made in reducing point source pollution through the enforcement of total maximum daily loads (TMDL). Climate change may impact NPS pollutant …
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Economic Analysis of Recapturing and Recycling Irrigation Techniques on Horticulture Nurseries
… water resources and public pressure to reduce non-point source pollution. In some circumstances, recapturing and recycling of irrigation water in horticultural nurseries can generate significant savings relative to the costs of alternative water sources and potentially reduce non-point source …
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Wilson's Creek, Greene and Christian Counties, Missouri: Water Quality Macroinvertebrate Indices, and Planning Implications Using Gis, Based on Watershed Landuse and Water Contamination Hazards
… years, due to nutrient enrichment, indicating non-point landuse influences. Residential landuse in the watershed increased 59.2% between 1984 and 1995, and only 28.3% of the watershed was in a low hazard area for water contamination. Only 10.4% of the watershed was in a low hazard area and not …
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